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Determination of the kinetic models and associated parameters for the low temperature combustion and gasification of high-ash coal chars
(North-West University, 2003)
South Africa has large coal reserves and the power generation industry produces
approximately 95% of the electricity from coal. Most of the high-grade coal is exported
leaving behind a discard of high ash coal. For the ...
Nickel recovery from spent electrolyte by nanofiltration
(North-West University, 2007)
South Africa is the world's leading producer of Platinum Group Metals (PGMs) and holds more than 80% of the world's reserves. Although PGMs are the most important
products in the ores, base metals are valuable by-products, ...
Comparison of industrial wastes as binder in the agglomeration of coal fines
(North-West University (South Africa)., 2021)
The industries that consumed the most coal in South Africa, in 2015, were electricity generation, 53%, basic iron and steel manufacturing, 20%, and synthetic fuel and chemical industries, 10%, with the rest being used in ...
Hydrogen generation by the reaction of mechanochemically activated aluminium and water
(North-West University (South Africa), 2019)
This dissertation presents a method to generate on-demand and pure hydrogen from neutral pH water using a hydrolysing material, i.e. mechanochemically activated aluminium (Al), under standard ambient conditions. The ...
Influence of moisture on the resistivity of selected South African fly ashes
(North-West University (South-Africa). Potchefstroom Campus, 2019)
The coals fired in the pulverised fuel boilers of South African power stations are generally of poor quality, producing numerous emissions, of which particulate matter has the largest impact in South Africa. Recently, the ...
The Influence of SO₃ conditioning on the resistivity of selected South African fly-ashes
(North-West University (South Africa), 2021)
Particulate emission legislation, as instructed by the Department of Environment, Forestry and Fisheries, implies a particulate emission limit of 50 mg/Nmᶟ (10% O2, dry basis) for all new and existing power stations by ...
A computational model for the description of electrostatic precipitator performance
(North-West University, 2019)
A comprehensive computational model of an electrostatic precipitator was developed by incorporating the interacting phenomenon of fluid dynamics, particle dynamics and electrostatics using the commercial software STAR-CCM+® ...
Nitric oxide reduction by chars derived from high ash inertinite-rich discard coals
(North-West University, 2010)
An investigation was performed to determine the kinetics of nitric oxide (NO) reduction by six different chars derived from inertinite-rich low grade coals. The experimentation involving the reduction of NO was confined ...
Separation by pervaporation of methanol from tertiary amyl methyl ether using a polymeric membrane
(Potchefstroom University for Christian Higher Education, 2003)
In this study, the sorption and pervaporation characteristics of the commercial PERVAP2256® membrane with methanol and tert-amyt methyl ether (TAME) mixtures were investigated. The feed concentration and the feed temperature ...
The influence of particle size on the steam gasification kinetics of coal
(North-West University, 2011)
Steam gasification has been extensively researched in order to optimise and efficiently utilise coal. Reactivity on powdered coal has received considerable attention, however, due to equipment limitation large coal particle ...